Across
1
Tectonic landmass section
3
Ball of burning gas in space
5
Unit of electric potential
7
The Red Planet
8
Icy body with a tail near the sun
10
Biological catalyst
11
Reddish electrical conductor
12
Gas form of a liquid
Down
2
Measure of matter in an object
4
Blocking of light by a celestial body
6
Force that attracts objects together
9
Push or pull on an object